(AP Photo/Detroit News, Elizabeth ConleyTeachers, students and family members gather outside Providence Hospital in Southfield after four students were shot at Henry Ford High School in Detroit onThursday. One of the students, 16-year-old Christopher Walker of Detroit, died in the shooting.

DETROIT — Police have arrested three teenagers suspected of shooting four other teens, one of them fatally, near a high school in northwest Detroit.

Deputy Detroit Police Chief James Tate says the three Henry Ford High School students and a former student were shot shortly after class let out about 3:15 p.m.

A spokesman for Providence Hospital in nearby Southfield confirms 16-year-old Christopher Walker died. Tate says two other students and a former student are hospitalized in temporary serious condition.

Tate says three male suspects, ages 15, 16 and 18, were arrested separately at their homes about 8:30 p.m. Thursday. He says the 16-year-old had fought earlier in the day with one of the victims. No names have been released.

Tate says police found at least seven shell casings at the scene but have not recovered any weapons.